//  Copyright © 2009-2021 John Sheehan, Andrew Young, Alexey Zimarev and RestSharp community
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
// http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System.Security.Cryptography;
using System.Text;

namespace RestSharp.Authenticators.OAuth.Extensions; 

static class OAuthExtensions {
    public static string ToRequestValue(this OAuthSignatureMethod signatureMethod) {
        var value    = signatureMethod.ToString().ToUpperInvariant();
        var shaIndex = value.IndexOf("SHA", StringComparison.Ordinal);

        return shaIndex > -1 ? value.Insert(shaIndex, "-") : value;
    }

    public static string HashWith(this string input, HashAlgorithm algorithm) {
        var data = Encoding.UTF8.GetBytes(input);
        var hash = algorithm.ComputeHash(data);

        return Convert.ToBase64String(hash);
    }
}